# Markdown Notes Editor vs Acoustic Detector

The clearest difference is update cadence: Acoustic Detector at weekly against Markdown Notes Editor's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Markdown Notes Editor sells 2 in-app purchases, starting at $9.99 per 7 days and Acoustic Detector sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Markdown Notes Editor ships an update monthly, Acoustic Detector weekly. The most recent releases landed on November 10, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Markdown Notes Editor | Acoustic Detector |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ctrl Alt Go Ltd](https://appshunter.io/developer/1784576658) | [Jean-David Giroux](https://appshunter.io/developer/6796142518) |

## What reviewers say

### Markdown Notes Editor

[App page](https://appshunter.io/ios/app/markdown-notes-editor-linen/id6775062589)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $9.99 | per 7 days |
| Pro Lifetime | $34.99 | one-time |


### Acoustic Detector

[App page](https://appshunter.io/ios/app/acoustic-detector/id6810440422)

Analyze and treat sound with professional-grade tools. Measure decibel levels, analyze frequency spectrums, and even plan room acoustics treatments. Offers a tuner for musical instruments and advanced features for recording and equalization.

**Highlights:** Live dB level with min, average, and max, Frequency spectrum analysis, Instrument tuner, Sound recording with markers, 31-band equalizer, Room reverberation time calculation (RT60), Acoustic material absorption data

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acoustic Detector Complete | $3.99 | one-time |


## Frequently asked questions

### Is Markdown Notes Editor free?

Markdown Notes Editor is free to download, with in-app purchases available.

### Is Acoustic Detector free?

Acoustic Detector is free to download, with in-app purchases available.

### Do Markdown Notes Editor or Acoustic Detector have ads?

Neither Markdown Notes Editor nor Acoustic Detector shows ads.

### Which is updated more often, Markdown Notes Editor or Acoustic Detector?

Markdown Notes Editor ships an update monthly, and Acoustic Detector weekly. Most recently, Markdown Notes Editor was updated on November 10, 2026 and Acoustic Detector on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*